Answer:
x < 30
Step-by-step explanation:
x is every number less or equal to 30
Answer:
The working of expressions is shown below.
Step-by-step explanation:
We are given the following information:
a) Expand
![3(x+4)\\3\times x + 3\times 4\\3x + 12](https://tex.z-dn.net/?f=3%28x%2B4%29%5C%5C3%5Ctimes%20x%20%2B%203%5Ctimes%204%5C%5C3x%20%2B%2012)
b) Expand and simplify
![4(x+5)-2(x-3)\\=(4x + 20) -(2x-6)\\=( 4x-2x) + (20 + 6)\\= 2x + 26\\=2(x +13)](https://tex.z-dn.net/?f=4%28x%2B5%29-2%28x-3%29%5C%5C%3D%284x%20%2B%2020%29%20-%282x-6%29%5C%5C%3D%28%204x-2x%29%20%2B%20%2820%20%2B%206%29%5C%5C%3D%202x%20%2B%2026%5C%5C%3D2%28x%20%2B13%29)
c) Expand
![(x+2)(x+7)\\=x\times x + x\times 7 + 2\times x + 2\times 7\\= x^2 + 7x + 2x + 14\\=x^2 + 9x +14](https://tex.z-dn.net/?f=%28x%2B2%29%28x%2B7%29%5C%5C%3Dx%5Ctimes%20x%20%2B%20x%5Ctimes%207%20%2B%202%5Ctimes%20x%20%2B%202%5Ctimes%207%5C%5C%3D%20x%5E2%20%2B%207x%20%2B%202x%20%2B%2014%5C%5C%3Dx%5E2%20%2B%209x%20%2B14)
d) Factorize fully
![12x-18\\=6(2x-3)](https://tex.z-dn.net/?f=12x-18%5C%5C%3D6%282x-3%29)
Answer:
2n = -4
Step-by-step explanation:
This is because the N is unknown and in the way it's written it means 2 times something is -4
Answer:
Temperature at 9 A.M = 13° F
Step-by-step explanation:
Given:
Temperature at 6 A.M = - 2° F
Temperature increases in 3 hours = 15° F
Find:
Temperature at 9 A.M
Computation:
Temperature at 9 A.M = Temperature at 6 A.M + Temperature increases in 3 hours
Temperature at 9 A.M = - 2° F + 15° F
Temperature at 9 A.M = 13° F
1. Convert all fractions to decimals.
7/8 = 0.875
5/12 = 0.417
11/2 = 5.5
3/4 = 0.75
4/5 = 0.8
3. Organize decimals from least to greatest.
0.417, 0.75, 0.8, 0.875, 5.5
4. Put back into fractions.
5/12, 3/4, 4/5, 7/8, 11/2.